/Engine/Plugins/Experimental/MeshModelingToolsetExp/Source/MeshModelingToolsExp/Public/MeshVertexPaintTool.h
enum EMeshVertexPaintToolUtilityOperations { BlendAllSeams, FillChannels, InvertChannels, CopyChannelToChannel, SwapChannels, CopyFromWeightMap, CopyToOtherLODs, CopyToSingleLOD, }